Picking cam and mounting therefor



Aug. 24, 1948.

B. w. BROUWER ET AL PICKING CAM AND MOUNTING THEREFOR Filed May 29, 1947IN VENTORS BENJAMIN w BROUWER v/cro lg F. SEPAV/CH ATTORNEY PatentedAug. 24, 1948 I Benjamin W. Brouwer, Auburm and Victor F." Sepavich,Worcester, Mass, assignors toC'romp ton & Knowles Iioom Works, acorporation-of Massachusetts Worcester, Maser,

Application May 29, 1947,'se1-ial No. mps

I. Thisinvention relates to improvements in picki-ng' mechanisms forlooms and'i't is the general object ofthe invention to provide animproved picking cam and mounting thereforfor the purpose of making thecam: operate more smoothly whenforceis applied'thereto by an actuator;

The picking mechanism for some looms includes a-roelzable shaftcarrying/a picker cam the workingsurface of which lies' in the path of arotating" aotuatororpfcking roili The shaft carries a picking arm whichis connected by a sweep stick to thepiclser stick and rocking of theshaft causes the picker arm to operate the pickerstick. As madeheretofore the'shafts have" been so mounted that they bend somewhat atthe beginning of the picking operation with the result that the firstpart of the movement of thepi'cking roll along'the camis-inefiective tomove. the picker stick.

It is an important object; of the present invention to provide a pickingcam so made that it can accommodate a'bearing forthe picking shaft andprevent bending of the shaft incident to engagement of the picking rollwith the picking ca m! The entire" time during whichthe picking rollengages the cam" is therefore available for acceleration of the shuttle;

In the type ofpi'cking mechani'sm'already mentioned it is frequently a,difficult matter toreplace.

a broken or worn pickingfcamv dueto the. manner in which the pickingshaft is mounted in its. bearings. Itis' another objectof thepresentinvent-ion to provide a picking cam including a shoe which can: bereadily removed" to permit. easy replacement without removing thepicking.

shaft from the. loom. 1 v

It is a further object of the invention to provide a picking cam so.formedthat it can accommodate a. picking shaft bearing, between itsends.

With these and other objects in view which will" appear as thedescription proceeds, our invention resides in the combinationancl.arrange-.

It supports top and bottom shafts II and I2, re--.

sclaims. (01. 139-147) spective1y,. which are connected by the usualgears l3 and 142' A l'ayl5" is reciprocated backwardly and' forwardly bymeans of connectors one of which is shown at lfi. A- shuttl'e Sis pickedhackrand forth across the lay by. picker sticks one ofwhich is shown atIT. Eachpicker stick is con nected' by asweep stickuliljto a picker arm19" mounted. on th'e corresponding picker shaftQZO which. extendsbackwardly .andlforwatdly in the loom. Each shaft ZD'is preferably ofrectangular cross section and may have front andback bearings 2ft'and'lZZj although as will appear. herein; after we are not necessarilylimited totheof bearings for the picking shaft shownin Fig.1. Bottomshaft f2 is usually provided with two. oppositely extending. actuator.on sweep arms, but herein we show only one pump arm at. 23' in Figs-1havingrotatably mounted, thereon a picking, roll. or ball 2'4". The rollmoves in av vertical path;and completes a Revolution every secondlpi'ckof the Thorn. Inthe usual type of loom the picking. rolls arealternately operative to pick the shuttle. The matter. thus. fardescribed. is of. common construction. but We. do. not wish to belimited tothebearings. of. the picking shaftor thev particularposition'shown for the. bottom shaft l2.

In carrying our present invention into effect we provide an improvedpickingcam. designated generally atC and an. auxiliary. bearing Bforthe. picker. shaft. ,2ll'.v Both sides of the 1mm, are. equipped with acam Clandbearihg B, butthe following. description. will be limited toonesideonly of},the'loom. The bearing 13 has a foot 311 provided withhorizontalslots 31. whiehreceivebolts ;32rby means of whichthe bearingistsecurelyfastened. to the. loom. frame; .The slots permita limitedamount of horizontal. adjustment of. thebearing- B in;- the; directionof. the lengthoi shaft. 20.; The-bearing. has a. hub, 33 within which isrotatablymount: ed a bushing 34 having a rectangular hole 35therethrough to fit the shatt 20.. i

. As shown more particularly in Fig. 3' cam G.-

' comprisesthree-parta which are. the cant shoe iitvand two-endplates orcollarsikl and. 4-2... shoe is provided with the cam surface 43 whichengages the picking roll 24 and extends along a vertical wall 45provided with a shelf or ri-b 46 formed as shown for instance in Figs. 2and 5. e Wa l and rib are substantially parallel to the shaft Z0.v

The end plates 4! and 42 are alike and are located on opposite sides ofthe hub 33. Each end plate has a square hole 41 therethrough which fitsthe shaft 20, and screws 48 and 49 pass through the wall 45 and into theend plates 4| and 42, respectively, to hold the shoe firmly in positionon the end plates. Each end plate has a notch 50 which receives theadjacent part of the angular rib 46. The latter is held tightly in thenotches 5B of the two end plates by the bolts 48 and 49. Set screws 5|hold the end plates on shaft 20 with the plates spaced slightly from thebearing and bushing.

In operation, the roll 24 will move in the direction of arrow a, Fig. 1,and after engaging the low side 52 of the cam will ride therealong tothe high side 53, thereby depressing the cam. and rockin shaft 20.Because of the fact that hub 33 is located as indicated in Fig. 3 therewill be no appreciable downward deflection of that part of the shaft 20on which the cam C is mounted and as a result picking arm I'9 will movecontinuously and at the desired accelerated rate to impart correctmovement to the shuttle from the time the roll 24 first engages the lowpoint 52 of the cam until it leaves the high point.

, In previous picking motions of this general type the cam has beenbetween the bearings for the shaft 20 with the result that upon initialengagement of the roll 24 with the low point 52 the shaft 20 hasdeflected downwardly and the first part of the movement of the roll 24has been lost so far as effective movement of the shuttle is con cerned.By having the, bearing B related to the cam substantially as shown forinstance in Figs. 1 and 3 angular movement of the shaft 20 is continuousthrougihout engagement of the cam with the picking roll.

Continued use is likely to produce wear on the cam necessitatingreplacement thereof. Under these conditions the bolts or screws 48 and49 are removed, after which the wall 45 is lifted until rib 46 clearsnotches 50, whereupon the shoe can be entirely removed from the endplates. By a reverse process a new shoe is attached to the end platesand the cam is ready for use. This operation does not require removal ofshaft 20 from bearin 33, nor is it necessary to loosen the end plates.If the bushing becomes worn, one of the end plates is removed to permitendwise sliding of the bushing out of bearing 33.

While we have shown the end plates 4| and 42 as being separate from theshoe 40 it is within the spirit of certain features of the invention tomake these three parts in one piece which they in effect are when thescrews 48 and 49 are tight. In any event,'the cam 43 or shoe 40 hasparts rigid therewith which lie on opposite sides of a bearing for thepicker shaft. I

From the foregoing it will be seen that we have provided simple means bywhich the picking cam can be made to accommodate a bearing for thepicking shaft. The bearing is preferably within the limits of thepicking cam, or at least between its ends measured in the directionendwise of the shaft 20. As a result of this constrwction the shaft 20is held against downward deflection at the beginning of a picking strokeand the whole period of engagement of the picking roll 24 with the loam40 is effective for rocking the shaft 20.

III

4. It will also be seen that when the end plates 4| and 42 are made moreparticularly as set forth herein they permit removal of the shoe 4!! forreplacement purposes without disturbing the bearing 33 or the shaft 20.

Having thus described our invention it will be seen that changes andmodifications may be made therein by those skilled in the art Withoutdeparting from the spirit and scope of the invention and we do not wishto be limited to the details herein disclosed, but what we claim is:

1. In a loom provided with a picking shaft, a picking cam on said shaftcomprising a cam shoe and spaced end plates rigid with respect theretosecured to the shaft, and a bearing for the shaft between said endplates and secured to the loom.

2. In a loom. provided with a picking shaft, a picking cam on said shaftcomprising spaced end plates secured to the shaft and a picking shoesecured to the plates, and a bearing for the shaft between said platesand secured to the loom.

3. In a loom provided with a picking shaft, a picking cam on said shaftcomprising spaced end plates secured to the shaft and interlocked with apicking shoe secured thereto, and a bearing for the shaft between saidplates and secured to the loom.

4. In a loom provided with a picking shaft, a picking cam on said shaftcomprising spaced end plates secured to the shaft, a picking shoe,removable means securing the shoe to said plates, and a bearing for theshaft between said end plates and secured to the loom.

5. In a loom provided with a picking shaft, 2. picking cam on said shaftcomprising spaced end plates, removable means normally holding saidplates secured to the shaft, a bearing for the shaft between said platesand secured to the loom, and a picking shoe secured to said end plates.

6. In a loom provided with a picking shaft of non-circular crosssection, end plates spaced from each other longitudinally of the shaft,removable means normally securing said plates to the shaft, a bushingsurrounding said shaft between the plates, a bearin between-the platesfor the bushing mounted on the loom, and a picking shoe secured to saidend plates.

'7. In a loom provided with a picking shaft of non-circular crosssection, end plates spaced longitudinally on the shaft and havingnon-circular holes fitting the shaft and secured to the latter, apicking shoe secured to the end plates, a bus hingbetween the plateshaving a hole of non-circular cross section therethrough fitting theshaft, and a bearing for the bushing between the plates and secured tothe loom.

8. In a loom provided with a picking shaft, a picking cam on said shaftcomprising a cam shoe having a rib thereon extending longitudinally ofthe shaft, spaced end plates secured to the shaft and having alignednotches receiving said rib, removable means securing the shoe to the endplates, and a bearing for the shaft between said end plates and securedto the loom.

BENJAMIN W. BROUWER. VICTOR F. SEPAVICH.

